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1. WO2013001512 - GAS INJECTION FOR MANAGED PRESSURE DRILLING

Publication Number WO/2013/001512
Publication Date 03.01.2013
International Application No. PCT/IB2012/053335
International Filing Date 29.06.2012
IPC
E21B 21/08 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
21Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
08Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
E21B 43/17 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
16Enhanced recovery methods for obtaining hydrocarbons
17Interconnecting two or more wells by fracturing or otherwise attacking the formation
E21B 43/12 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
12Methods or apparatus for controlling the flow of the obtained fluid to or in wells
E21B 43/25 2006.01
EFIXED CONSTRUCTIONS
21EARTH OR ROCK DRILLING; MINING
BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
43Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
25Methods for stimulating production
CPC
E21B 21/16
EFIXED CONSTRUCTIONS
21EARTH DRILLING; MINING
BEARTH DRILLING, e.g. DEEP DRILLING
21Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
16using gaseous fluids
Applicants
  • SCHLUMBERGER TECHNOLOGY B.V. [NL]/[NL] (AL, AM, AU, AZ, BF, BG, BJ, BY, CF, CG, CI, CM, CO, CZ, DE, DK, GA, GN, GQ, GR, GW, HU, ID, IE, IL, IT, KG, KP, KR, KZ, LT, MD, ML, MR, MX, MY, NE, NO, NZ, OM, PL, QA, RO, RU, SI, SK, SN, TD, TG, TH, TJ, TM, TN, TR, TT, UZ, ZA)
  • SCHLUMBERGER HOLDINGS LIMITED (GB, JP, NL)
  • SCHLUMBERGER CANADA LIMITED [CA]/[CA] (CA)
  • SERVICES PETROLIERS SCHLUMBERGER [FR]/[FR] (FR)
  • PRAD RESEARCH AND DEVELOPMENT LIMITED (AE, AG, AL, AM, AO, AT, AZ, BA, BB, BE, BF, BG, BH, BJ, BR, BW, BY, BZ, CF, CG, CH, CI, CL, CM, CN, CR, CU, CY, DM, DO, DZ, EC, EE, EG, ES, FI, GA, GD, GE, GH, GM, GN, GQ, GT, GW, HN, HR, IN, IS, JP, KE, KG, KM, KN, KP, KZ, LA, LC, LK, LR, LS, LU, LV, LY, MA, MC, MD, ME, MG, MK, ML, MN, MR, MT, MW, MZ, NA, NE, NG, NI, PE, PG, PH, PT, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, SN, ST, SV, SY, SZ, TD, TG, TH, TJ, TM, TZ, UA, UG, VC, VN, ZM, ZW)
  • SCHLUMBERGER SEACO, INC [PA]/[KR] (KR)
  • JOHNSON, Ashley Bernard [GB]/[GB] (UsOnly)
Inventors
  • JOHNSON, Ashley Bernard
Agents
  • FORD, Michael F.
Priority Data
61/503,28030.06.2011US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) GAS INJECTION FOR MANAGED PRESSURE DRILLING
(FR) INJECTION DE GAZ POUR FORAGE À PRESSION GÉRÉE
Abstract
(EN)
Injection of gas into a managed pressure drilling system to provide for operation of the drilling system in a pressure window defined by the pore pressure of a formation being drilled and a fracture pressure of the formation. The gas is injected through gas injection ports and drilling fluids are allowed to flow between the drilling annulus and the gas injection system though a plurality of flow ports that are disposed vertically below the gas injection ports in the borehole being drilled. The gas injection ports and the flow ports are configured so that when gas is flowing through the gas injection ports, the flow ports are sealed.
(FR)
L'invention porte sur l'injection de gaz dans un système de forage à pression gérée pour réaliser le fonctionnement du système de forage dans une fenêtre de pression définie par la pression de pores d'une formation qui est forée et une pression de fracture de la formation. Le gaz est injecté à travers des orifices d'injection de gaz, et des fluides de forage sont admis à s'écouler entre l'anneau de forage et le système d'injection de gaz à travers une pluralité d'orifices d'écoulement qui sont disposés verticalement en dessous des orifices d'injection de gaz dans le trou de forage qui est foré. Les orifices d'injection de gaz et les orifices d'écoulement sont configurés de sorte que, lorsqu'un gaz s'écoule à travers les orifices d'injection de gaz, les orifices d'écoulement soient hermétiquement scellés.
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